Enlarge then cropping capture video

[Jokris]

Hello, first of all I want to thank you all for this great community. I have learned so much regarding converting video from you all. Now to my problem

I use a Hauppage capture device together with AmarecTV to capture analog camcorder material. I then intend to use nnedi3 and upscale from 720 x 576 to 1140 x 1152

Example file before upscaling: https://drive.google.com/file/d/1AjY8DD-m5hrZaTiKYrRSVX1_zPH03CLc/view?usp=drivesdk

But... if you look at the right side of my video you see a vertical flickering portion, which I want to crop.

Would it be better for me to upscale the video a bit more than I intend to, and then crop the video down to 1440 x 1152? And if so, what resolution should I upscale to and how much should I then crop afterwards in order to get rid of the flicker?

[Alwyn]

720x576 (1.25:1 or 5:4) isn't the "correct" frame size/ratio, it's only the capture frame size. The display size is 4:3, or 1.333 to 1, effectively 768x576. You can see what it should look like by opening in VLC Player and forcing a 4:3 display (or VDub, right-click on the video display and choose 4:3).

So, your upscale should be to 1440x1080.

Re your cropping, IMO there's no need to upscale above and then crop down: I would just crop in a 4:3 ratio (x4 off the sides, x3 off the top+bottom) then upscale to 1440x1080. The problem with cropping back down is you have to get it exact or you'll need to resize again.

BUT! Make sure you de-interlace first, before any cropping; if you crop before deinterlacing, you may mess up the field order and end up with jaggies on your Progressive encode.

FYI, I'd suggest capturing with the audio on PCM(WAV). That will yield the best audio quality. you can MP3 (or AAC) it later.

[Jokris]

Thanks for your detailed answer!

Do you suggest I crop first, then upscale? Or upscale to 11440x1080, then crop, and finally upscale again?

[Alwyn]

Crop then upscale.

[dellsam34]

I'm assuming the source is an analog tape, So the legal resolution is 702 to 704 by 576, You first de-interlace, then crop and then resize, Your frame needed cropping 2 lines each from top and bottom, 4 pixels from the left and 16 pixels from the right which is within the legal aspect ratio, Here is what it would look like:

[Sharc]

I'm assuming the source is an analog tape, So the legal resolution is 702 to 704 by 576, You first de-interlace, then crop and then resize, Your frame needed cropping 2 lines each from top and bottom, 4 pixels from the left and 16 pixels from the right which is within the legal aspect ratio

+1, exactly for this analog tape capture.

[Jokris]

I see. As of now I have deinterlaced and upscaled in Hybrid to 1440x1152 in 8000 kbps, reducing their file size from about 25GB to 3GB

But what I should do is:
1. Deinterlace in Hybrid, no upscaling, in 8000 kbps (thus reducing the file size)
2. Crop image to 4:3
3. Upscale in Hybrid to 1440x1080 with nnedi3 in a higher bitrate?

[dellsam34]

You do all those before compression or encoding otherwise you will be losing quality every time you do a step.

[Alwyn]

@Jokris, what's your exact workflow? Are you cropping in Hybrid too? If cropping externally, export out of Hybrid after deinterlacing in a lossless codec such as HUFF, UT or FFV1 (can't remember exactly what lossless AVI options are any more). Then crop and export/save as.

Otherwise, you should be able to do the whole lot in Hybrid as it does have a cropping function (not that I know how to use it). So, Deinterlace, crop, resize then export/save as.

@Dellsam, you need to take another couple of pixels off the bottom there.